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Actin and myosin are the molecules used for muscle contraction.
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∙ 13y ago
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∙ 14y agoActin and myosin are essential proteins in muscle contraction.
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∙ 12y agoActin is a myofilament in skeletal muscle that is a big component of muscle contractions. Actin contains two smaller myofilaments called Troponin and Tropomyosin.
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∙ 9y agoActin and myosin are both protein molecules responsible for generating movement.
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∙ 12y agoproteins
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Binding sites on the actin molecules are covered by troponin and?
muscle that produces a give movement
Myosin contains two binding sites for what two molecules?
ATP (--> ADP+Pi) and actin
What is composed of actin?
Actin is essentially a ball ('globular') with two key features: 1. a particular region binds and hydrolyzes adenosine triphosphate (ATP); 2. Other regions allow actin molecules to bind to one another head-to-tail. I won't discuss the ATP hydrolysis here. When actin molecules bind each other, they form a spiral-staircase-like ('alpha-helical') string called a 'filament.' Multiple actin filaments come together to form bundles or fibers. These higher-order structures are so big and so prevalent that they can be seen in living cells through a microscope. The atomic structure of globular actin is available for free here: http://www.ncbi.nlm.nih.gov/Structure/mmdb/mmdbsrv.cgi?uid=47984
What part of the cytoskeleton is made of actin subunits?
Micro filaments
What 2 proteins make up the mass of a muscle cell?
Actin and myosin interact in muscle cells.
Does protein make actin and myosin?
Actin and myosin are proteins. Protein is a broad category of molecules.
What three molecules make up the thin filament?
1. Actin 2. Tropomyosin 3. Troponin
ADP molecules on the surface of actin serve as active sites for the formation of cross bridges with molecules of?
ATP not ADP binds to actin-myosin and is cleaved by to ADP.
Where is the protein called actin located in the body?
ATP molecules
What blocks the binding sites on actin?
TROPOMYOSIN MOLECULES ( troponin hold the tropomyosin in place)
Binding sites on the actin molecules are covered by troponin and?
muscle that produces a give movement
Myosin contains two binding sites for what two molecules?
ATP (--> ADP+Pi) and actin
What are regulatory molecules?
Regulatory molecules are commonly types of proteins which will regulate the functions of the muscles. The interaction of actin and myosin is regulated which will trigger muscle contraction.
What is actin or myosin-containing structure?
actin and myosin are myofillaments that make up myofibrils (part of a muscle fibre) (so therefore : muscle is an actin or myosin containing structure
Which type of myofilament is composed of thick long complexes of protein molecules and have appendages known as bridges?
actin
When a muscle is at rest the active sites on the actin are blocked by?
TROPOMYOSIN MOLECULES ( troponin hold the tropomyosin in place)
What is composed of actin?
Actin is essentially a ball ('globular') with two key features: 1. a particular region binds and hydrolyzes adenosine triphosphate (ATP); 2. Other regions allow actin molecules to bind to one another head-to-tail. I won't discuss the ATP hydrolysis here. When actin molecules bind each other, they form a spiral-staircase-like ('alpha-helical') string called a 'filament.' Multiple actin filaments come together to form bundles or fibers. These higher-order structures are so big and so prevalent that they can be seen in living cells through a microscope. The atomic structure of globular actin is available for free here: http://www.ncbi.nlm.nih.gov/Structure/mmdb/mmdbsrv.cgi?uid=47984
